<template>
    <!-- 表单 -->
    <el-form inline="true">
        <el-form-item label="创建日期">
            <el-date-picker v-model="datetimeRange" style="width: 240px" type="datetimerange" range-separator="至"
                start-placeholder="开始日期" end-placeholder="结束日期"></el-date-picker>
        </el-form-item>
        <el-form-item label="竞赛名称">
            <el-input v-model="params.title" placeholder="请您输入要搜索的竞赛名称" />
        </el-form-item>
        <el-form-item>
            <el-button @click="onSearch" plain>搜索</el-button>
            <el-button @click="onReset" plain type="info">重置</el-button>
            <el-button type="primary" :icon="Plus" plain @click="onAddExam">添加竞赛</el-button>
        </el-form-item>
    </el-form>
    <!-- 表格 -->
    <el-table height="526px" :data="examList">
        <el-table-column prop="title" label="竞赛标题" />
        <el-table-column prop="startTime" width="180px" label="竞赛开始时间" />
        <el-table-column prop="endTime" width="180px" label="竞赛结束时间" />
        <el-table-column label="是否开赛" width="100px">
            <!-- 默认插槽 -->
            <template #default="{ row }">
                <div v-if="!isNotStartExam(row)">
                    <el-tag type="warning">已开赛</el-tag>
                </div>
                <div v-else>
                    <el-tag type="info">未开赛</el-tag>
                </div>
            </template>
        </el-table-column>
        <el-table-column prop="status" width="100px" label="是否发布">
            <template #default="{ row }">
                <div v-if="row.status == 0">
                    <el-tag type="danger">未发布</el-tag>
                </div>
                <div v-if="row.status == 1">
                    <el-tag type="success">已发布</el-tag>
                </div>
            </template>
        </el-table-column>
        <el-table-column prop="createName" width="140px" label="创建用户" />
        <el-table-column prop="createTime" width="180px" label="创建时间" />
        <el-table-column label="操作" width="180px">
            <template #default="{ row }">
                <el-button v-if="isNotStartExam(row) && row.status == 0" type="text" @click="onEdit(row.examId)">编辑
                </el-button>
                <el-button v-if="isNotStartExam(row) && row.status == 0" type="text" @click="onDelete(row.examId)"
                    class="red">删除
                </el-button>
                <!-- 已发布,未开始,才能撤销 -->
                <el-button v-if="row.status == 1 && isNotStartExam(row)" type="text"
                    @click="cancelPublishExam(row.examId)">撤销发布</el-button>
                <el-button v-if="row.status == 0 && isNotStartExam(row)" type="text"
                    @click="publishExam(row.examId)">发布</el-button>
                <el-button type="text" v-if="!isNotStartExam(row)">已开赛，不允许操作</el-button>
            </template>
        </el-table-column>
    </el-table>
    <!-- 分页区域 -->
    <el-pagination background size="small" layout="total, sizes, prev, pager, next, jumper" :total="total"
        v-model:current-page="params.pageNum" v-model:page-size="params.pageSize" :page-sizes="[5, 10, 15, 20]"
        @size-change="handleSizeChange" @current-change="handleCurrentChange" />
</template>

<script setup>
import { Plus } from '@element-plus/icons-vue'
import { getExamListService, delExamService, publishExamService, cancelPublishExamService } from '@/apis/exam'

import { reactive, ref } from 'vue'
import router from '@/router'

function isNotStartExam(exam) {
    const now = new Date(); //当前时间
    return new Date(exam.startTime) > now  //竞赛开始时间与当前时间进行对比
}

// 请求参数
const params = reactive({
    pageNum: 1,
    pageSize: 10,
    startTime: '',
    endTime: '',
    title: ''
})


const examList = ref([])
const total = ref(0)
//定义一个响应式数组
const datetimeRange = ref([])

//封装请求列表接口
async function getExamList() {
    //判断是否为时间类型
    if (datetimeRange.value[0] instanceof Date) {
        //对应,转化赋值  转为String类型
        params.startTime = datetimeRange.value[0].toISOString()
    }
    if (datetimeRange.value[1] instanceof Date) {
        params.endTime = datetimeRange.value[1].toISOString()
    }
    const result = await getExamListService(params)
    examList.value = result.rows
    total.value = result.total
}
getExamList()

function handleSizeChange(newSize) {
    params.pageNum = 1
    getExamList()
}

function handleCurrentChange(newPage) {
    getExamList()
}

function onSearch() {
    params.pageNum = 1
    getExamList()
}

function onReset() {
    params.pageNum = 1
    params.pageSize = 10
    params.title = ''
    params.startTime = ''
    params.endTime = ''
    //dateTime也要置空,不然会二次赋值
    datetimeRange.value.length = 0
    getExamList()
}

function onAddExam() {
    //跳转到新的页面上   新页面路由
    //通过type区分是添加还是编辑
    router.push("/oj/layout/updateExam?type=add")
}

async function onEdit(examId) {
    // await getExamDetailService(examId)   //在这里处理还要把结果传给updateExam.vue,麻烦
    //将竞赛id传给updateExam.vue,id是从竞赛页面获取的
    router.push(`/oj/layout/updateExam?type=edit&examId=${examId}`)
    ///oj/layout/updateExam?type=edit&examId=${examId}
    ///oj/layout/updateExam?type=edit&examId=123
}

async function onDelete(examId) {
    await delExamService(examId)
    params.pageNum = 1
    getExamList()
}

async function publishExam(examId) {
    await publishExamService(examId)
    getExamList()
}

async function cancelPublishExam(examId) {
    await cancelPublishExamService(examId)
    getExamList()
}

</script>